1,721,004 research outputs found
Neutron flux characterisation of the Pavia TRIGA Mark II research reactor for radiobiological and microdosimetric applications
Full text linkNowadays the Pavia TRIGA reactor is available for national and international collaboration in various research fields. The TRIGA Mark II nuclear research reactor of the Pavia University offers different in- and out-core neutron irradiation channels, each characterised by different neutron spectra. In the last two years a campaign of measurements and simulations has been performed in order to guarantee a better characterisation of these different fluxes and to meet the demands of irradiations that require precise information on these spectra in particular for radiobiological and microdosimetric studies. Experimental data on neutron fluxes have been collected analysing and measuring the gamma activity induced in thin target foils of different materials irradiated in different TRIGA experimental channels. The data on the induced gamma activities have been processed with the SAND II deconvolution code and finally compared with the spectra obtained with Monte Carlo simulations. The comparison between simulated and measured spectra showed a good agreement allowing a more precise characterisation of the neutron spectra and a validation of the adopted method
Neutron flux characterization of the Pavia TRIGA Mark II reactor for radiobiological and microdosimetric applications.
No full textNuclear Education & Training activity experience at the University of Pavia
No full textAt the University of Pavia, at the Laboratory for Applied Nuclear Energy (LENA) is installed a 250kW TRIGA MKII Type Research Reactor together with a radiochemistry laboratory dedicated to the manipulation, analysis and radiochemistry separations. As a University institution, one of the main purposes is to prepare new generations of students and graduates for their careers. The Laboratory, as a facility at the disposal of different University departments, provides practical exercises as part of university classes in particular for Physics, Chemistry and, within agreements with other Universities, also in nuclear engineering. The University of Pavia, in consideration of its facilities and expertise, hosts international courses and hands-on training to foreign Regulatory Body personnel, health physics staff, and radiation protection Advisors. The assets and key points of practical courses are discussed together with a list of the achievable expected outcomes
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Neutron Spectrometry for the University of Pavia TRIGA Thermal Neutron Source Facility
No full textThe University of Pavia and the Idaho National
Laboratory (INL) are collaborating in the field of
medical neutron dosimetry specific to Neutron
Capture Therapy (NCT) radiobiological research
applications. Recognizing the importance of
accurate and reproducible radiation dosimetry as an
essential tool for interpretation and combination of
preclinical and clinical results from different research
facilities that are active in this field, we have
conducted an experimental characterization of the
neutronic performance of the reactor based thermal
neutron source for nuclear medical research at the
University of Pavia TRIGATM research reactor. This
activity is part of a larger dosimetry intercomparison
exercise, based on a common experimental protocol
that also includes the thermal neutron irradiation
facilities used for medical research at the Missouri
University Research Reactor (MURR) and the RA-3
Research Reactor in Buenos Aires, Argentina
Utilization of the Triga Research Reactor of the University of Pavia.
Full text linkThe Laboratory of Applied Nuclear Energy (LENA), operates the TRIGA nuclear research reactor of the University of Pavia for more that 100 days per year, carrying out multidisciplinary activities in collaboration, or as a provider, with several institutions industries and research centres both at national and international level. This paper will present an overview of LENA’s reactor utilization
Measurement of the neutron flux parameters f and α at the Pavia TRIGA Mark II reactor
Full text linkIn this paper, evaluation of neutron flux parameters of TRIGA Mark II reactor in Pavia was carried out. For any of the three irradiation positions investigated, this work represented the first experimental evaluation of α. Moreover, in addition to α, values of other parameters such as f, Φth and Φe were also calculated and compared with the existent literature data from other TRIGA Mark II reactors and the Pavia’s facility. Results obtained in the present study represent a mandatory step ahead for future application of k0-Neutron Activation Analysis method (k0-NAA) at Pavia’s facility
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